Radiator shutter



Dec, 30. 192%? 1,521,362

G. M. DUNLAP RADIATOR SHUTTER Filed Feb. 8, 1924 2 Sheets-Sheet 2 4 e@:1| 9 @www efmee@C@ c @a @WW @C @a @G @u @G @o @C @@@Qn O G G o G C Q 1@E Q Patented Dec. 30, 1924.

UNITED STATES GEORGE II. DUNLAP, or CHICAGO, ILLINOIS.

RADIATOR SHUTTER.

Application led February 8, 1924. Serial No. 691,489.

To all lwhom z'v' may concern:

Be it known that I, GEORGE M. DUNLAP, a citizen of the. United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Radiator Shutters, ofwhich the following is a specification.

This invention relates to devices for regulating the flow of air throughthe radiator of an automobile. Specifically, it is a shutter applicableto the frontend of such a radiator, equipped with means operatable fromthe dash of the automobile for controlling the different positions ofthe moving parts of the shutter, and, consequently, the amount of airadlnitted.

The invention consists in means very easily and cheaply constructableand applicable to the front of an automobile radiator, which is veryefficient in operation and is not readily liable to get out of order.

Particularly, the invention consists in the application of two platescovering substantially the end of the radiator, equipped with aplurality of air admitting perforations, one of the pla-tes beingslidable across the face of the other plate whereby va greater or lessnumber of perforations in the respective plates can be brought into orout of register with each other, thereby controlllng the admission ofair to the radiator. The invention further consists in many features anddetails of construction which will be hereafter more fully set forth inthe specification and claim.

Referring to the drawings in which like numerals designate the sameparts throughout the several views:

Figure 1 is a front view of a radiator equipped with mechanism of thisinvention, the parts of the shutter being in the normal full openposition in which a maximum quantity of air is admitted to the radiator.

Figure 2 is -a sectional detail view on the irregular line 2-2 of Figurel.

Figure 3 is a rear view of the shutterk mechanism, as shown in Figures 1and 2, as sold in commerce apart from the radiator.

Figure 4 is a changed position view of the mechanism of Figure 3 inwhich the shutter is closed.

The shutter mechanism of this invention` designed to be sold as aseparate article of equi ment, apart from an automobile and a pliedthereto at the will of the user, consists generically of an outer orface plate 10,

second or shutter plate 18, movable between the full open position ofFigures 1-3 and the closed position of Figure 4, the two plates 10 and18 being respectively provided with sets of perforati ons 20 and 22which register with each other when the parts are as shown in Figures 1and 2 and which are out ofv register with each other when the parts arein the closed position of Figure 4. The movable or inner plate 18 isnormally held in the open position of Figure 3 by suitable springmechanism, specifically the spring 24, attached at one end to the bolt15 and at the other end to a lug 26 or plate 18.

In the particular embodiment of the device here illustrated, the spring24 is so positioned that. it rocks the plate 18 in a clockwise directionuntil stopped by engagement of the lower side of a notch 28 in the topof the plate on the under side of a washer 30 of bolt 12 and theengagement of the vertical side 32 of a notch 34 in the lower left handcorner of the plate 18 on a washer 36 on bolt 13. The plate 18 ismanually movable from the normal or open position of Figures 1-3 to theclosed position of Figure 4 through the agency of a cord or cable 38attached to the lower edge of plate 18 at a point suitably remote frompivot bolt 14, said cord leading thence over suitable pulleys 40 and 42to handle 44 extending through the dash 46 of the automobile. The loweredge of the inner portion of this handle 44 is provided with suitablenotches 48 adapted to selectively lit over the latch plate 50 borderingthe perforation 52 in the dash 46 through which the handle member 44passes. By adjusting selected ones of these notches 48 on the plate 50,the operator can vary the position of the plate 18 between the full openposition of Figures .1-3 and the full closed position of Figure 4 tothereby provide varying sized passages through the complete shuttermechanism.

It has been found in actual practice that by the construction described,very close regulation of the amount of air admitted to the radiator canbe obtained; that because of the simplicity and small number of parts inthe device, there is little, if any, danger of failure in successfuloperation.

Attention called to the yfact that b y. placing the pivot bolt 14 at oneside 0f the plates 10 and 18, specifically at one cornery of thesubstantially rectangular plate shown, 5 and by providing a large numberof per- 'forations 20 and 22 in the respective plates,

' a very fine gradation in the volume of airv admitted through thedevice is obtained. Having thus described my invention, ywhat 10 Iclaimasnew and desire to secure'by Letters Patent is:

In mechanism of `thefclass-described, a .pla-te vprovided with aplurality of perfora-A nous@ second parallelv plate pride'ai withcorresponding erforatlons registering `in one .position W1th theperforations in the first plate, means at one edge of the plates`thereby' controlling theA aggregate passage` of airwthrough they devlce.

n witness whereof, I have hereunto subi scribed my name. v Y GEORGE M.DUNLAP.

